Wednesday, November 28, 2018

Immigrants’ gut bacteria “westernize” soon after they move to the U.S


The Atlantic Nov 1, 2018
In Thailand, a small group of Hmong women lived in a rural village, far from the nearest town. They grew everything they ate, mostly rice and vegetables. They boiled most of their food, and they rarely consumed meat.

But then something happened to these Hmong women that shocked their systems, permanently altering, in just a short time, the course of their health—as well as the very germs that dwelled inside of them. They immigrated to the United States.

In their new homeland—Minneapolis—they began to eat more protein, sugar, and fat. They indulged, like most Americans do, in processed food. Within a generation, the Hmong women went from having an obesity rate of 5 percent to one of more than 30 percent.

That statistic reflects one of the most vexing things about the well-being of immigrants in the U.S.: Many people who come to the U.S. for a better life end up with worse health. Many different studies have now shown that the longer certain groups live in the U.S., the worse some of their health outcomes get, especially when it comes to obesity. One study found that after one year in America, just 8 percent of immigrants are obese, but among those who have lived in the U.S. for 15 years, the obesity rate is 19 percent.

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